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| author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2012-11-23 13:44:39 +0100 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2012-12-17 17:11:32 +0000 |
| commit | 850a5b670af6293fcb1852af57567d19150ff638 (patch) | |
| tree | 929a247a47c6c4e58dcf77e5ca4b5490e46e0646 /Documentation | |
| parent | cb71941a682270dd5164d1332900694d19caa5e1 (diff) | |
| download | lwn-850a5b670af6293fcb1852af57567d19150ff638.tar.gz lwn-850a5b670af6293fcb1852af57567d19150ff638.zip | |
spi/atmel: add DT support
Use the newly introduce cs-gpios dt support on atmel.
We do not use the hardware cs as it's wired and has bugs and limitations.
As the controller believes that only active-low devices/systems exists.
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/spi/spi_atmel.txt | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spi/spi_atmel.txt b/Documentation/devicetree/bindings/spi/spi_atmel.txt new file mode 100644 index 000000000000..07e04cdc0c9e --- /dev/null +++ b/Documentation/devicetree/bindings/spi/spi_atmel.txt @@ -0,0 +1,26 @@ +Atmel SPI device + +Required properties: +- compatible : should be "atmel,at91rm9200-spi". +- reg: Address and length of the register set for the device +- interrupts: Should contain spi interrupt +- cs-gpios: chipselects + +Example: + +spi1: spi@fffcc000 { + compatible = "atmel,at91rm9200-spi"; + reg = <0xfffcc000 0x4000>; + interrupts = <13 4 5>; + #address-cells = <1>; + #size-cells = <0>; + cs-gpios = <&pioB 3 0>; + status = "okay"; + + mmc-slot@0 { + compatible = "mmc-spi-slot"; + reg = <0>; + gpios = <&pioC 4 0>; /* CD */ + spi-max-frequency = <25000000>; + }; +}; |